JPH0619671Y2 - Dustproof device for rock crusher - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention is a chisel that is slidably inserted into a rock breaking machine body by switching a hydraulic valve for operating the rock breaking machine provided in a hydraulic circuit and operating a piston. The present invention relates to a dust proof device for a rock crushing machine that hits.

(Prior Art) A conventional rock crusher will be described with reference to FIG. 9. (1) is a cylindrical rock crusher main body, (2) is a chisel slidably inserted into the rock crusher main body (1), (3) is a piston slidably inserted into the rock-crusher body (1), (4) is a seal portion, and (5) is the rock-crusher body
At the sliding part between (1) and the chisel (2), the hydraulic valve for crusher operation provided in the hydraulic circuit (not shown) is switched to operate the piston (3), and the crusher main body (1) The rock (6) is crushed by hitting the chisel (2) that is slidably inserted inside.

(Problems to be solved by the invention) In the conventional rock crusher shown in FIG. 9, fine particles or dust (6a) generated when crushing rock (6) causes the rock crusher main body.
Penetrating the sliding part between the (1) and the chisel (2) and the seal part (4),
There was a problem of damaging the chisel (2) and piston (3).

The present invention is proposed in view of the above problems, and an object of the present invention is to provide a dust crusher for a rock crusher capable of preventing damage to a chisel and a piston due to intrusion of dust and the like.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention switches a rock breaking machine operating hydraulic valve provided in a hydraulic circuit to an opening direction, and advances a piston by a pressure oil from the hydraulic circuit. Then, in a rock crusher that strikes a chisel slidably inserted in the rock crusher main body, the same sliding from the outside of dust etc. by supplying pressurized air to the sliding portion between the rock crusher main body and the chisel Pressure air supply circuit to prevent invasion into the section, an air opening / closing valve provided in the pressure air supply circuit, an operating means, and a movement of the operating means to the air opening / closing valve and the rock breaking machine operating hydraulic valve. And a connecting means for switching these valves in the opening direction in the order of the air opening / closing valve and the hydraulic valve for crusher operation.

(Operation) The dust control device for a rock crusher of the present invention is configured as described above, and the operation means is operated to transmit the movement thereof to the rock crusher operation hydraulic valve through the connecting means to operate the rock drill operation. Switch the hydraulic valve for opening to the opening direction, move the piston forward with the pressure oil from the hydraulic circuit, hit the chisel slidably inserted in the rock breaking machine body, and when breaking rock, The movement is transmitted to the air opening / closing valve of the pressure air supply circuit, the air opening / closing valve is switched to the opening direction, and immediately before the piston moves forward, the pressure air is transferred from the pressure air supply circuit to the sliding part between the rock crusher body and the chisel. Supply it to prevent dust from entering the sliding part from the outside.

(Embodiment) Next, the dust proof device for a rock crusher of the present invention will be described with reference to an embodiment shown in FIGS. 1 to 4. (1) in FIG. 1 is a rock crusher main body, (2) is a chisel, ( 3) is piston, (4) is seal part, (4)
Is a sliding part between the rock breaking body (1) and the chisel (2), (7)
(8) is a compressed air supply port provided in the rock breaking body (1), (9)
Is a pressure air supply chamber formed around the piston (3) below the seal part (4), (10) is a pressure air supply source, and (11) is the same pressure air supply source from the pressure air supply source (10). A pressure air supply circuit extending to the ports (7) and (8), (12) a filter provided in the same pressure air supply circuit (11), and (13) a reguulator provided in the same pressure air supply circuit (11) ( 14) is an on-off valve provided in the same pressure air supply circuit (11). Further, (15) is a pressure oil supply source, (16) is a hydraulic circuit extending from the pressure oil supply source (15) to the pressurizing chamber (not shown) of the piston (3), and (17) is the hydraulic circuit. The hydraulic valve for operating the rock breaking machine at (16), (18) is the operation petal provided at the driver's seat of the construction machine (see Fig. 8), and the operation petal (18) operates the rock breaking machine through a link. The hydraulic valve (17) and the air opening / closing valve (14) are connected. The system of the above link is the second
More specifically, referring to FIG. 3, (21) is an L-shaped link rotatable in the direction of arrow C about the pivot point (19), and (20) is the upper end of the link (21) and the operation petal. A link connecting with (18), a link (23) swinging around the lower end, and a link (22) connecting the upper end of the link (23) and the lower end of the link L-shaped link (21). The link, (24), is a link that connects the upper end of the link (23) and the spool (17a) of the rock breaking machine operating hydraulic valve (17), and at the outer end of the link (24). As shown in FIGS. 4 (I) and (II), a long hole is provided, and the pin fixed to the outer end of the spool (17a) is slidably inserted into the long hole on the link (24) side. Has been done. Note that S ₁ indicates the stroke range of the pin, and this stroke S ₁ delays the opening operation of the rock breaking machine operating hydraulic valve (17) with respect to the opening operation of the air opening / closing valve (14). Also, (27) is the pivot point (26)
A link swingable about the link, (25) a link connecting the lower end of the link (27) and the upper end of the link (23), (28)
Is a link that directly connects the upper end of the link (27) and the spool of the air on-off valve (14). The movement of the operation petal (18) in the direction of arrow A is transmitted to the link (20), and the same link ( 20) moves in the direction of arrow B, and the movement of the link (20) is an L-shaped link.
When transmitted to (21), the link (21) rotates about the pivot point (19) in the direction of arrow C, and the movement of the link (21) is linked (22).
Is transmitted to the link (22) in the direction of arrow D, and the movement of the link (22) is transmitted to the link (23).
(23) swings around the lower end, the movement is transmitted to the link (25), the link (25) moves in the direction of arrow D, and the movement of the link (25) is linked (27). The link (2
7) rotates in the direction of arrow E around the pivot point (26), and the link
The movement of (27) is transmitted to the spool of the link (28) and the air opening / closing valve (14), and the spool of the link (28) and the spool of the air opening / closing valve (14) moves in the arrow F direction (opening direction). . In addition, the movement of the link (23) is linked to the link (24) and the hydraulic valve (1
When transmitted to the spool (17a) of 7), the link (24) and the spool (17a) of the rock breaking machine operating hydraulic valve (17) move in the opening direction. At this time, since the link (24) and the spool (17a) of the rock breaking machine operating hydraulic valve (17) are connected through the elongated hole and the pin, the spool of the air opening / closing valve (14) is stroke S ₁ only. Operates in the opening direction later than.

Next, the operation of the dustproof device of the rock breaking machine shown in FIGS. 1 to 4 will be described. When the operation petal (18) is operated in the direction of arrow A, the movement of the operation petal (18) in the direction of arrow A is linked (2
0), the link (20) moves in the direction of arrow B, the movement of the link (20) is transmitted to the L-shaped link (21), and the link (21) is pivoted (19). Rotate in the direction of arrow C about
The movement of the link (21) is transmitted to the link (22), the link (22) moves in the direction of the arrow D, the movement of the link (22) is transmitted to the link (23), and the link (22) is transmitted. 23) swings around the lower end and the movement is transmitted to the link (25),
(25) moves in the direction of arrow D, the movement of the link (25) is transmitted to the link (27), and the link (27) rotates in the direction of arrow E around the pivot point (26), The movement of the link (27) is linked (2
8) and the spool of the air on-off valve (14), the link (28) and the spool of the air on-off valve (14) move in the arrow F direction (open direction). Therefore, the pressure air supply source (10)
The pressure air of the pressure air supply circuit (11) → pressure air supply port
Pressure air supply chamber (9) below the seal (4) via (7)
And to the sliding portion (5) between the crusher body (1) and the chisel (2). Also the above link
The movement of (23) is transmitted to the link (24) and the spool (17a) of the rock crusher actuating hydraulic valve (17), so that the link (24) and the rock crusher actuating hydraulic valve (17) spool (17a) Moves in the opening direction,
The piston (3) descends and strikes the chisel (2),
(2) descends and rocks (6) are crushed. At this time, the debris and dust (6a) are scattered, but the compressed air is supplied as described above, and the debris and dust (6a) are also applied to the sliding portion (5) with the above pressure. It does not enter the air supply chamber (9).

In addition, Fig. 5 (I) and (II) show the hydraulic valve (1
Provide a long hole at the outer end of the spool (17a) of 7), and
It is another embodiment in which a pin is fixed to the end of (24).

Further, FIG. 6 shows a link (22) on the operation petal (18) side, a link (28) on the air opening / closing valve (14) side, and a hydraulic valve (17) for operating a rock breaking machine.
In another embodiment in which the side link (24) and the side link (24) are connected via a link (27) (a link (27) which rotates about a pivot (26)), the pivot (26) side is connected to the link (28) side. Distance to L ₁ , pivot (26)
Let L ₂ be the distance from the link (24) side to L ₁ <L
₂ , the spool (17a) of the rock breaking machine operating hydraulic valve (17) operates in the opening direction later than the spool of the air opening / closing valve (14) in this case as well.

Further, FIG. 7 shows that when the spool of the air opening / closing valve (14) is operated in the opening direction, the air pressure of the pressure air circuit (11) passes through the pilot pressure circuit (30) and the spool of the hydraulic valve (17) for rock crusher operation ( 17a)
And the spool (17a) is moved in the opening direction. In this case, too, the hydraulic valve (17) for crusher operation
The spool (17a) of the valve operates in the opening direction later than the spool of the air opening / closing valve (14).

(Effect of the Invention) In the dust crusher for a rock crusher of the present invention, the operation means is operated as described above, and the movement thereof is transmitted to the rock crusher operating hydraulic valve through the connecting means. Switching to the opening direction, the piston moves forward with the pressure oil from the hydraulic circuit, hits the chisel slidably inserted in the rock breaking machine body, and when the rock is crushed, the movement of the operating means is changed by pressure air. It is transmitted to the air on-off valve of the supply circuit, the air on-off valve is switched to the opening direction, and immediately before the piston advances, pressure air is supplied from the pressure air supply circuit to the sliding portion between the rock crusher body and the chisel, Since dust or the like is prevented from entering the sliding portion from the outside, the chisel or piston can be prevented from being damaged due to the dust or the like entering.

[Brief description of drawings]

FIG. 1 is a system diagram showing an embodiment of a dust crusher for a rock breaking machine according to the present invention, FIG. 2 is a plan view showing a connecting means between an air opening / closing valve and a hydraulic valve for operating a rock breaking machine, and FIG. Side view, 4th
Fig. (I) is an enlarged plan view of a portion indicated by an arrow IV in Fig. 3, Fig. 4 (II) is an enlarged side view of the same portion, and Fig. 5 (I) is an enlarged plan view showing another embodiment of the same portion. 5 (II) is an enlarged side view of the same portion, FIG. 6 is a side view showing another embodiment of the connecting means between the air on-off valve and the hydraulic valve for rock crusher operation, and FIG. 7 is the air on-off valve. And FIG. 8 is a side view showing an example of arrangement of operating petals, and FIG. 9 is a vertical side view showing a conventional rock crusher. is there. (1) …… Crusher body, (2) …… Chisel, (3) …… Piston, (5) …… Sliding part, (11) …… Pressure air supply circuit, (14)
…… Air on-off valve, (15) …… Hydraulic actuating hydraulic valve, (16)…
… Hydraulic circuit, (18)… Operating means, (19) to (28) or (30)
...... Means of connection.

Front page continuation (72) Ichiro Nakayama 4 1106 Shimizu, Uozumi-cho, Akashi-shi, Hyogo Sanbishi Heavy Industries Ltd. Akashi Works (72) Shunsuke Takahashi 4 106 1 Shimizu, Uozumi-cho, Akashi-shi, Hyogo Nishihishi Engineering Co., Ltd. Akashi Engineering Department (56) Bibliography Sho 55-159289 (JP, U) Suiko 57-12076 (JP, Y2)

Claims (1)

[Scope of utility model registration request] 1. A rock crusher actuating hydraulic valve provided in a hydraulic circuit is switched to an opening direction, a piston is advanced by pressure oil from the hydraulic circuit, and a chisel slidably inserted into the rock crusher main body. In a crushing rock crusher, a pressure air supply circuit that supplies pressure air to the sliding portion between the rock crusher main body and the chisel to prevent dust and the like from entering the sliding portion from the outside, and the same pressure air supply circuit. An air opening / closing valve provided in the circuit, an operating means, and a movement of the operating means are transmitted to the air opening / closing valve and the hydraulic valve for operating the rock crusher, and these valves are sequentially arranged in the order of the air opening / closing valve and the hydraulic valve for operating the rock crusher. A dust crusher for a rock crushing machine, comprising a connecting means for switching to an opening direction.